[mirror_ubuntu-jammy-kernel.git] / fs / gfs2 / incore.h

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#ifndef __INCORE_DOT_H__
#define __INCORE_DOT_H__

#include <linux/fs.h>

#define DIO_FORCE	0x00000001
#define DIO_CLEAN	0x00000002
#define DIO_DIRTY	0x00000004
#define DIO_START	0x00000008
#define DIO_WAIT	0x00000010
#define DIO_METADATA	0x00000020
#define DIO_DATA	0x00000040
#define DIO_RELEASE	0x00000080
#define DIO_ALL		0x00000100

struct gfs2_log_operations;
struct gfs2_log_element;
struct gfs2_holder;
struct gfs2_glock;
struct gfs2_quota_data;
struct gfs2_trans;
struct gfs2_ail;
struct gfs2_jdesc;
struct gfs2_sbd;

typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);

/*
 * Structure of operations that are associated with each
 * type of element in the log.
 */

struct gfs2_log_operations {
	void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
	void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
	void (*lo_before_commit) (struct gfs2_sbd *sdp);
	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
	void (*lo_before_scan) (struct gfs2_jdesc *jd,
				struct gfs2_log_header *head, int pass);
	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
				 struct gfs2_log_descriptor *ld, __be64 *ptr,
				 int pass);
	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
	const char *lo_name;
};

struct gfs2_log_element {
	struct list_head le_list;
	const struct gfs2_log_operations *le_ops;
};

struct gfs2_bitmap {
	struct buffer_head *bi_bh;
	char *bi_clone;
	u32 bi_offset;
	u32 bi_start;
	u32 bi_len;
};

struct gfs2_rgrpd {
	struct list_head rd_list;	/* Link with superblock */
	struct list_head rd_list_mru;
	struct list_head rd_recent;	/* Recently used rgrps */
	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
	struct gfs2_rindex rd_ri;
	struct gfs2_rgrp rd_rg;
	u64 rd_rg_vn;
	struct gfs2_bitmap *rd_bits;
	unsigned int rd_bh_count;
	struct mutex rd_mutex;
	u32 rd_free_clone;
	struct gfs2_log_element rd_le;
	u32 rd_last_alloc_data;
	u32 rd_last_alloc_meta;
	struct gfs2_sbd *rd_sbd;
};

enum gfs2_state_bits {
	BH_Pinned = BH_PrivateStart,
	BH_Escaped = BH_PrivateStart + 1,
};

BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)
BUFFER_FNS(Escaped, escaped)
TAS_BUFFER_FNS(Escaped, escaped)

struct gfs2_bufdata {
	struct buffer_head *bd_bh;
	struct gfs2_glock *bd_gl;

	struct list_head bd_list_tr;
	struct gfs2_log_element bd_le;

	struct gfs2_ail *bd_ail;
	struct list_head bd_ail_st_list;
	struct list_head bd_ail_gl_list;
};

struct gfs2_gl_hash_bucket {
        rwlock_t hb_lock;
        struct list_head hb_list;
};

struct gfs2_glock_operations {
	void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
			     int flags);
	void (*go_xmote_bh) (struct gfs2_glock * gl);
	void (*go_drop_th) (struct gfs2_glock * gl);
	void (*go_drop_bh) (struct gfs2_glock * gl);
	void (*go_sync) (struct gfs2_glock * gl, int flags);
	void (*go_inval) (struct gfs2_glock * gl, int flags);
	int (*go_demote_ok) (struct gfs2_glock * gl);
	int (*go_lock) (struct gfs2_holder * gh);
	void (*go_unlock) (struct gfs2_holder * gh);
	void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
	void (*go_greedy) (struct gfs2_glock * gl);
	const int go_type;
};

enum {
	/* Actions */
	HIF_MUTEX		= 0,
	HIF_PROMOTE		= 1,
	HIF_DEMOTE		= 2,
	HIF_GREEDY		= 3,

	/* States */
	HIF_ALLOCED		= 4,
	HIF_DEALLOC		= 5,
	HIF_HOLDER		= 6,
	HIF_FIRST		= 7,
	HIF_ABORTED		= 9,
};

struct gfs2_holder {
	struct list_head gh_list;

	struct gfs2_glock *gh_gl;
	struct task_struct *gh_owner;
	unsigned int gh_state;
	unsigned gh_flags;

	int gh_error;
	unsigned long gh_iflags;
	struct completion gh_wait;
	unsigned long gh_ip;
};

enum {
	GLF_PLUG		= 0,
	GLF_LOCK		= 1,
	GLF_STICKY		= 2,
	GLF_PREFETCH		= 3,
	GLF_DIRTY		= 5,
	GLF_SKIP_WAITERS2	= 6,
	GLF_GREEDY		= 7,
};

struct gfs2_glock {
	struct list_head gl_list;
	unsigned long gl_flags;		/* GLF_... */
	struct lm_lockname gl_name;
	struct kref gl_ref;

	spinlock_t gl_spin;

	unsigned int gl_state;
	struct task_struct *gl_owner;
	unsigned long gl_ip;
	struct list_head gl_holders;
	struct list_head gl_waiters1;	/* HIF_MUTEX */
	struct list_head gl_waiters2;	/* HIF_DEMOTE, HIF_GREEDY */
	struct list_head gl_waiters3;	/* HIF_PROMOTE */

	const struct gfs2_glock_operations *gl_ops;

	struct gfs2_holder *gl_req_gh;
	gfs2_glop_bh_t gl_req_bh;

	void *gl_lock;
	char *gl_lvb;
	atomic_t gl_lvb_count;

	u64 gl_vn;
	unsigned long gl_stamp;
	void *gl_object;

	struct gfs2_gl_hash_bucket *gl_bucket;
	struct list_head gl_reclaim;

	struct gfs2_sbd *gl_sbd;

	struct inode *gl_aspace;
	struct gfs2_log_element gl_le;
	struct list_head gl_ail_list;
	atomic_t gl_ail_count;
};

struct gfs2_alloc {
	/* Quota stuff */

	struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
	unsigned int al_qd_num;

	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
	u32 al_alloced; /* Filled in by gfs2_alloc_*() */

	/* Filled in by gfs2_inplace_reserve() */

	unsigned int al_line;
	char *al_file;
	struct gfs2_holder al_ri_gh;
	struct gfs2_holder al_rgd_gh;
	struct gfs2_rgrpd *al_rgd;

};

enum {
	GIF_QD_LOCKED		= 1,
	GIF_PAGED		= 2,
	GIF_SW_PAGED		= 3,
};

struct gfs2_inode {
	struct inode i_inode;
	struct gfs2_inum i_num;

	unsigned long i_flags;		/* GIF_... */

	u64 i_vn;
	struct gfs2_dinode i_di; /* To be replaced by ref to block */

	struct gfs2_glock *i_gl; /* Move into i_gh? */
	struct gfs2_holder i_iopen_gh;
	struct gfs2_holder i_gh; /* for prepare/commit_write only */
	struct gfs2_alloc i_alloc;
	u64 i_last_rg_alloc;

	spinlock_t i_spin;
	struct rw_semaphore i_rw_mutex;
	unsigned int i_greedy;
	unsigned long i_last_pfault;

	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
};

/*
 * Since i_inode is the first element of struct gfs2_inode,
 * this is effectively a cast.
 */
static inline struct gfs2_inode *GFS2_I(struct inode *inode)
{
	return container_of(inode, struct gfs2_inode, i_inode);
}

/* To be removed? */
static inline struct gfs2_sbd *GFS2_SB(struct inode *inode)
{
	return inode->i_sb->s_fs_info;
}

enum {
	GFF_DID_DIRECT_ALLOC	= 0,
	GFF_EXLOCK = 1,
};

struct gfs2_file {
	unsigned long f_flags;		/* GFF_... */
	struct mutex f_fl_mutex;
	struct gfs2_holder f_fl_gh;
};

struct gfs2_revoke {
	struct gfs2_log_element rv_le;
	u64 rv_blkno;
};

struct gfs2_revoke_replay {
	struct list_head rr_list;
	u64 rr_blkno;
	unsigned int rr_where;
};

enum {
	QDF_USER		= 0,
	QDF_CHANGE		= 1,
	QDF_LOCKED		= 2,
};

struct gfs2_quota_lvb {
        __be32 qb_magic;
        u32 __pad;
        __be64 qb_limit;      /* Hard limit of # blocks to alloc */
        __be64 qb_warn;       /* Warn user when alloc is above this # */
        __be64 qb_value;       /* Current # blocks allocated */
};

struct gfs2_quota_data {
	struct list_head qd_list;
	unsigned int qd_count;

	u32 qd_id;
	unsigned long qd_flags;		/* QDF_... */

	s64 qd_change;
	s64 qd_change_sync;

	unsigned int qd_slot;
	unsigned int qd_slot_count;

	struct buffer_head *qd_bh;
	struct gfs2_quota_change *qd_bh_qc;
	unsigned int qd_bh_count;

	struct gfs2_glock *qd_gl;
	struct gfs2_quota_lvb qd_qb;

	u64 qd_sync_gen;
	unsigned long qd_last_warn;
	unsigned long qd_last_touched;
};

struct gfs2_log_buf {
	struct list_head lb_list;
	struct buffer_head *lb_bh;
	struct buffer_head *lb_real;
};

struct gfs2_trans {
	unsigned long tr_ip;

	unsigned int tr_blocks;
	unsigned int tr_revokes;
	unsigned int tr_reserved;

	struct gfs2_holder tr_t_gh;

	int tr_touched;

	unsigned int tr_num_buf;
	unsigned int tr_num_buf_new;
	unsigned int tr_num_buf_rm;
	struct list_head tr_list_buf;

	unsigned int tr_num_revoke;
	unsigned int tr_num_revoke_rm;
};

struct gfs2_ail {
	struct list_head ai_list;

	unsigned int ai_first;
	struct list_head ai_ail1_list;
	struct list_head ai_ail2_list;

	u64 ai_sync_gen;
};

struct gfs2_jdesc {
	struct list_head jd_list;

	struct inode *jd_inode;
	unsigned int jd_jid;
	int jd_dirty;

	unsigned int jd_blocks;
};

#define GFS2_GLOCKD_DEFAULT	1
#define GFS2_GLOCKD_MAX		16

#define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
#define GFS2_QUOTA_OFF		0
#define GFS2_QUOTA_ACCOUNT	1
#define GFS2_QUOTA_ON		2

#define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
#define GFS2_DATA_WRITEBACK	1
#define GFS2_DATA_ORDERED	2

struct gfs2_args {
	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	int ar_spectator; /* Don't get a journal because we're always RO */
	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	int ar_debug; /* Oops on errors instead of trying to be graceful */
	int ar_upgrade; /* Upgrade ondisk/multihost format */
	unsigned int ar_num_glockd; /* Number of glockd threads */
	int ar_posix_acl; /* Enable posix acls */
	int ar_quota; /* off/account/on */
	int ar_suiddir; /* suiddir support */
	int ar_data; /* ordered/writeback */
};

struct gfs2_tune {
	spinlock_t gt_spin;

	unsigned int gt_ilimit;
	unsigned int gt_ilimit_tries;
	unsigned int gt_ilimit_min;
	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	unsigned int gt_incore_log_blocks;
	unsigned int gt_log_flush_secs;
	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */

	unsigned int gt_scand_secs;
	unsigned int gt_recoverd_secs;
	unsigned int gt_logd_secs;
	unsigned int gt_quotad_secs;

	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	unsigned int gt_quota_scale_num; /* Numerator */
	unsigned int gt_quota_scale_den; /* Denominator */
	unsigned int gt_quota_cache_secs;
	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	unsigned int gt_new_files_jdata;
	unsigned int gt_new_files_directio;
	unsigned int gt_max_atomic_write; /* Split big writes into this size */
	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	unsigned int gt_lockdump_size;
	unsigned int gt_stall_secs; /* Detects trouble! */
	unsigned int gt_complain_secs;
	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
	unsigned int gt_entries_per_readdir;
	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
	unsigned int gt_greedy_default;
	unsigned int gt_greedy_quantum;
	unsigned int gt_greedy_max;
	unsigned int gt_statfs_quantum;
	unsigned int gt_statfs_slow;
};

enum {
	SDF_JOURNAL_CHECKED	= 0,
	SDF_JOURNAL_LIVE	= 1,
	SDF_SHUTDOWN		= 2,
	SDF_NOATIME		= 3,
};

#define GFS2_GL_HASH_SHIFT	13
#define GFS2_GL_HASH_SIZE	(1 << GFS2_GL_HASH_SHIFT)
#define GFS2_GL_HASH_MASK	(GFS2_GL_HASH_SIZE - 1)
#define GFS2_FSNAME_LEN		256

struct gfs2_sbd {
	struct super_block *sd_vfs;
	struct super_block *sd_vfs_meta;
	struct kobject sd_kobj;
	unsigned long sd_flags;	/* SDF_... */
	struct gfs2_sb sd_sb;

	/* Constants computed on mount */

	u32 sd_fsb2bb;
	u32 sd_fsb2bb_shift;
	u32 sd_diptrs;	/* Number of pointers in a dinode */
	u32 sd_inptrs;	/* Number of pointers in a indirect block */
	u32 sd_jbsize;	/* Size of a journaled data block */
	u32 sd_hash_bsize;	/* sizeof(exhash block) */
	u32 sd_hash_bsize_shift;
	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
	u32 sd_qc_per_block;
	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
	u32 sd_max_height;	/* Max height of a file's metadata tree */
	u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];

	struct gfs2_args sd_args;	/* Mount arguments */
	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */

	/* Lock Stuff */

	struct lm_lockstruct sd_lockstruct;
	struct list_head sd_reclaim_list;
	spinlock_t sd_reclaim_lock;
	wait_queue_head_t sd_reclaim_wq;
	atomic_t sd_reclaim_count;
	struct gfs2_holder sd_live_gh;
	struct gfs2_glock *sd_rename_gl;
	struct gfs2_glock *sd_trans_gl;

	/* Inode Stuff */

	struct inode *sd_master_dir;
	struct inode *sd_jindex;
	struct inode *sd_inum_inode;
	struct inode *sd_statfs_inode;
	struct inode *sd_ir_inode;
	struct inode *sd_sc_inode;
	struct inode *sd_qc_inode;
	struct inode *sd_rindex;
	struct inode *sd_quota_inode;

	/* Inum stuff */

	struct mutex sd_inum_mutex;

	/* StatFS stuff */

	spinlock_t sd_statfs_spin;
	struct mutex sd_statfs_mutex;
	struct gfs2_statfs_change sd_statfs_master;
	struct gfs2_statfs_change sd_statfs_local;
	unsigned long sd_statfs_sync_time;

	/* Resource group stuff */

	u64 sd_rindex_vn;
	spinlock_t sd_rindex_spin;
	struct mutex sd_rindex_mutex;
	struct list_head sd_rindex_list;
	struct list_head sd_rindex_mru_list;
	struct list_head sd_rindex_recent_list;
	struct gfs2_rgrpd *sd_rindex_forward;
	unsigned int sd_rgrps;

	/* Journal index stuff */

	struct list_head sd_jindex_list;
	spinlock_t sd_jindex_spin;
	struct mutex sd_jindex_mutex;
	unsigned int sd_journals;
	unsigned long sd_jindex_refresh_time;

	struct gfs2_jdesc *sd_jdesc;
	struct gfs2_holder sd_journal_gh;
	struct gfs2_holder sd_jinode_gh;

	struct gfs2_holder sd_ir_gh;
	struct gfs2_holder sd_sc_gh;
	struct gfs2_holder sd_qc_gh;

	/* Daemon stuff */

	struct task_struct *sd_scand_process;
	struct task_struct *sd_recoverd_process;
	struct task_struct *sd_logd_process;
	struct task_struct *sd_quotad_process;
	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	unsigned int sd_glockd_num;

	/* Quota stuff */

	struct list_head sd_quota_list;
	atomic_t sd_quota_count;
	spinlock_t sd_quota_spin;
	struct mutex sd_quota_mutex;

	unsigned int sd_quota_slots;
	unsigned int sd_quota_chunks;
	unsigned char **sd_quota_bitmap;

	u64 sd_quota_sync_gen;
	unsigned long sd_quota_sync_time;

	/* Log stuff */

	spinlock_t sd_log_lock;

	unsigned int sd_log_blks_reserved;
	unsigned int sd_log_commited_buf;
	unsigned int sd_log_commited_revoke;

	unsigned int sd_log_num_gl;
	unsigned int sd_log_num_buf;
	unsigned int sd_log_num_revoke;
	unsigned int sd_log_num_rg;
	unsigned int sd_log_num_databuf;
	unsigned int sd_log_num_jdata;
	unsigned int sd_log_num_hdrs;

	struct list_head sd_log_le_gl;
	struct list_head sd_log_le_buf;
	struct list_head sd_log_le_revoke;
	struct list_head sd_log_le_rg;
	struct list_head sd_log_le_databuf;

	unsigned int sd_log_blks_free;
	struct mutex sd_log_reserve_mutex;

	u64 sd_log_sequence;
	unsigned int sd_log_head;
	unsigned int sd_log_tail;
	int sd_log_idle;

	unsigned long sd_log_flush_time;
	struct rw_semaphore sd_log_flush_lock;
	struct list_head sd_log_flush_list;

	unsigned int sd_log_flush_head;
	u64 sd_log_flush_wrapped;

	struct list_head sd_ail1_list;
	struct list_head sd_ail2_list;
	u64 sd_ail_sync_gen;

	/* Replay stuff */

	struct list_head sd_revoke_list;
	unsigned int sd_replay_tail;

	unsigned int sd_found_blocks;
	unsigned int sd_found_revokes;
	unsigned int sd_replayed_blocks;

	/* For quiescing the filesystem */

	struct gfs2_holder sd_freeze_gh;
	struct mutex sd_freeze_lock;
	unsigned int sd_freeze_count;

	/* Counters */

	atomic_t sd_glock_count;
	atomic_t sd_glock_held_count;
	atomic_t sd_inode_count;
	atomic_t sd_reclaimed;

	char sd_fsname[GFS2_FSNAME_LEN];
	char sd_table_name[GFS2_FSNAME_LEN];
	char sd_proto_name[GFS2_FSNAME_LEN];

	/* Debugging crud */

	unsigned long sd_last_warning;
	struct vfsmount *sd_gfs2mnt;
};

#endif /* __INCORE_DOT_H__ */
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#ifndef __INCORE_DOT_H__
	11	#define __INCORE_DOT_H__
	12
f2f7ba52 SW	13	#include <linux/fs.h>
f2f7ba52 SW	14
b3b94faa DT	15	#define DIO_FORCE 0x00000001
	16	#define DIO_CLEAN 0x00000002
	17	#define DIO_DIRTY 0x00000004
	18	#define DIO_START 0x00000008
	19	#define DIO_WAIT 0x00000010
	20	#define DIO_METADATA 0x00000020
	21	#define DIO_DATA 0x00000040
	22	#define DIO_RELEASE 0x00000080
	23	#define DIO_ALL 0x00000100
	24
	25	struct gfs2_log_operations;
	26	struct gfs2_log_element;
b3b94faa DT	27	struct gfs2_holder;
b3b94faa DT	28	struct gfs2_glock;
b3b94faa	29	struct gfs2_quota_data;
b3b94faa DT	30	struct gfs2_trans;
	31	struct gfs2_ail;
	32	struct gfs2_jdesc;
b3b94faa DT	33	struct gfs2_sbd;
	34
	35	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	36
	37	/*
	38	* Structure of operations that are associated with each
	39	* type of element in the log.
	40	*/
	41
	42	struct gfs2_log_operations {
	43	void (lo_add) (struct gfs2_sbd sdp, struct gfs2_log_element *le);
	44	void (lo_incore_commit) (struct gfs2_sbd sdp, struct gfs2_trans *tr);
	45	void (lo_before_commit) (struct gfs2_sbd sdp);
	46	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	47	void (lo_before_scan) (struct gfs2_jdesc jd,
	48	struct gfs2_log_header *head, int pass);
	49	int (lo_scan_elements) (struct gfs2_jdesc jd, unsigned int start,
	50	struct gfs2_log_descriptor ld, __be64 ptr,
	51	int pass);
	52	void (lo_after_scan) (struct gfs2_jdesc jd, int error, int pass);
b09e593d	53	const char *lo_name;
b3b94faa DT	54	};
	55
	56	struct gfs2_log_element {
	57	struct list_head le_list;
b09e593d	58	const struct gfs2_log_operations *le_ops;
b3b94faa DT	59	};
	60
	61	struct gfs2_bitmap {
	62	struct buffer_head *bi_bh;
	63	char *bi_clone;
cd915493 SW	64	u32 bi_offset;
	65	u32 bi_start;
	66	u32 bi_len;
b3b94faa DT	67	};
	68
	69	struct gfs2_rgrpd {
	70	struct list_head rd_list; /* Link with superblock */
	71	struct list_head rd_list_mru;
	72	struct list_head rd_recent; /* Recently used rgrps */
	73	struct gfs2_glock rd_gl; / Glock for this rgrp */
	74	struct gfs2_rindex rd_ri;
	75	struct gfs2_rgrp rd_rg;
cd915493	76	u64 rd_rg_vn;
b3b94faa DT	77	struct gfs2_bitmap *rd_bits;
b3b94faa DT	78	unsigned int rd_bh_count;
f55ab26a	79	struct mutex rd_mutex;
cd915493	80	u32 rd_free_clone;
b3b94faa	81	struct gfs2_log_element rd_le;
cd915493 SW	82	u32 rd_last_alloc_data;
cd915493 SW	83	u32 rd_last_alloc_meta;
b3b94faa DT	84	struct gfs2_sbd *rd_sbd;
	85	};
	86
	87	enum gfs2_state_bits {
	88	BH_Pinned = BH_PrivateStart,
f42faf4f	89	BH_Escaped = BH_PrivateStart + 1,
b3b94faa DT	90	};
	91
	92	BUFFER_FNS(Pinned, pinned)
	93	TAS_BUFFER_FNS(Pinned, pinned)
f42faf4f SW	94	BUFFER_FNS(Escaped, escaped)
f42faf4f SW	95	TAS_BUFFER_FNS(Escaped, escaped)
b3b94faa DT	96
	97	struct gfs2_bufdata {
	98	struct buffer_head *bd_bh;
	99	struct gfs2_glock *bd_gl;
	100
	101	struct list_head bd_list_tr;
	102	struct gfs2_log_element bd_le;
	103
	104	struct gfs2_ail *bd_ail;
	105	struct list_head bd_ail_st_list;
	106	struct list_head bd_ail_gl_list;
	107	};
	108
85d1da67 SW	109	struct gfs2_gl_hash_bucket {
	110	rwlock_t hb_lock;
	111	struct list_head hb_list;
	112	};
	113
b3b94faa DT	114	struct gfs2_glock_operations {
	115	void (go_xmote_th) (struct gfs2_glock gl, unsigned int state,
	116	int flags);
	117	void (go_xmote_bh) (struct gfs2_glock gl);
	118	void (go_drop_th) (struct gfs2_glock gl);
	119	void (go_drop_bh) (struct gfs2_glock gl);
	120	void (go_sync) (struct gfs2_glock gl, int flags);
	121	void (go_inval) (struct gfs2_glock gl, int flags);
	122	int (go_demote_ok) (struct gfs2_glock gl);
	123	int (go_lock) (struct gfs2_holder gh);
	124	void (go_unlock) (struct gfs2_holder gh);
	125	void (go_callback) (struct gfs2_glock gl, unsigned int state);
	126	void (go_greedy) (struct gfs2_glock gl);
8fb4b536	127	const int go_type;
b3b94faa DT	128	};
	129
	130	enum {
	131	/* Actions */
	132	HIF_MUTEX = 0,
	133	HIF_PROMOTE = 1,
	134	HIF_DEMOTE = 2,
	135	HIF_GREEDY = 3,
	136
	137	/* States */
	138	HIF_ALLOCED = 4,
	139	HIF_DEALLOC = 5,
	140	HIF_HOLDER = 6,
	141	HIF_FIRST = 7,
b3b94faa DT	142	HIF_ABORTED = 9,
	143	};
	144
	145	struct gfs2_holder {
	146	struct list_head gh_list;
	147
	148	struct gfs2_glock *gh_gl;
	149	struct task_struct *gh_owner;
	150	unsigned int gh_state;
fe1bdedc	151	unsigned gh_flags;
b3b94faa DT	152
b3b94faa DT	153	int gh_error;
695165df	154	unsigned long gh_iflags;
b3b94faa	155	struct completion gh_wait;
d0dc80db	156	unsigned long gh_ip;
b3b94faa DT	157	};
	158
	159	enum {
	160	GLF_PLUG = 0,
	161	GLF_LOCK = 1,
	162	GLF_STICKY = 2,
	163	GLF_PREFETCH = 3,
b3b94faa DT	164	GLF_DIRTY = 5,
	165	GLF_SKIP_WAITERS2 = 6,
	166	GLF_GREEDY = 7,
	167	};
	168
	169	struct gfs2_glock {
	170	struct list_head gl_list;
	171	unsigned long gl_flags; /* GLF_... */
	172	struct lm_lockname gl_name;
	173	struct kref gl_ref;
	174
	175	spinlock_t gl_spin;
	176
	177	unsigned int gl_state;
320dd101 SW	178	struct task_struct *gl_owner;
320dd101 SW	179	unsigned long gl_ip;
b3b94faa DT	180	struct list_head gl_holders;
	181	struct list_head gl_waiters1; /* HIF_MUTEX */
	182	struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
	183	struct list_head gl_waiters3; /* HIF_PROMOTE */
	184
8fb4b536	185	const struct gfs2_glock_operations *gl_ops;
b3b94faa DT	186
	187	struct gfs2_holder *gl_req_gh;
	188	gfs2_glop_bh_t gl_req_bh;
	189
9b47c11d	190	void *gl_lock;
b3b94faa DT	191	char *gl_lvb;
	192	atomic_t gl_lvb_count;
	193
cd915493	194	u64 gl_vn;
b3b94faa DT	195	unsigned long gl_stamp;
	196	void *gl_object;
	197
	198	struct gfs2_gl_hash_bucket *gl_bucket;
	199	struct list_head gl_reclaim;
	200
	201	struct gfs2_sbd *gl_sbd;
	202
	203	struct inode *gl_aspace;
	204	struct gfs2_log_element gl_le;
	205	struct list_head gl_ail_list;
	206	atomic_t gl_ail_count;
	207	};
	208
	209	struct gfs2_alloc {
	210	/* Quota stuff */
	211
e9fc2aa0 SW	212	struct gfs2_quota_data al_qd[2MAXQUOTAS];
e9fc2aa0 SW	213	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
6b61b072	214	unsigned int al_qd_num;
b3b94faa	215
6b61b072 SW	216	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
6b61b072 SW	217	u32 al_alloced; /* Filled in by gfs2_alloc_() /
b3b94faa DT	218
	219	/* Filled in by gfs2_inplace_reserve() */
	220
b3b94faa	221	unsigned int al_line;
6b61b072	222	char *al_file;
b3b94faa DT	223	struct gfs2_holder al_ri_gh;
	224	struct gfs2_holder al_rgd_gh;
	225	struct gfs2_rgrpd *al_rgd;
	226
b3b94faa DT	227	};
	228
	229	enum {
b3b94faa DT	230	GIF_QD_LOCKED = 1,
	231	GIF_PAGED = 2,
	232	GIF_SW_PAGED = 3,
	233	};
	234
	235	struct gfs2_inode {
320dd101	236	struct inode i_inode;
b3b94faa DT	237	struct gfs2_inum i_num;
b3b94faa DT	238
b3b94faa DT	239	unsigned long i_flags; /* GIF_... */
b3b94faa DT	240
cd915493	241	u64 i_vn;
feaa7bba	242	struct gfs2_dinode i_di; /* To be replaced by ref to block */
b3b94faa	243
feaa7bba	244	struct gfs2_glock i_gl; / Move into i_gh? */
b3b94faa	245	struct gfs2_holder i_iopen_gh;
f42faf4f	246	struct gfs2_holder i_gh; /* for prepare/commit_write only */
b3b94faa	247	struct gfs2_alloc i_alloc;
cd915493	248	u64 i_last_rg_alloc;
b3b94faa DT	249
	250	spinlock_t i_spin;
	251	struct rw_semaphore i_rw_mutex;
b3b94faa DT	252	unsigned int i_greedy;
	253	unsigned long i_last_pfault;
	254
	255	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
	256	};
	257
feaa7bba SW	258	/*
	259	* Since i_inode is the first element of struct gfs2_inode,
	260	* this is effectively a cast.
	261	*/
320dd101 SW	262	static inline struct gfs2_inode GFS2_I(struct inode inode)
	263	{
	264	return container_of(inode, struct gfs2_inode, i_inode);
	265	}
	266
feaa7bba SW	267	/* To be removed? */
	268	static inline struct gfs2_sbd GFS2_SB(struct inode inode)
	269	{
	270	return inode->i_sb->s_fs_info;
	271	}
	272
b3b94faa DT	273	enum {
b3b94faa DT	274	GFF_DID_DIRECT_ALLOC = 0,
59a1cc6b	275	GFF_EXLOCK = 1,
b3b94faa DT	276	};
	277
	278	struct gfs2_file {
	279	unsigned long f_flags; /* GFF_... */
f55ab26a	280	struct mutex f_fl_mutex;
b3b94faa	281	struct gfs2_holder f_fl_gh;
b3b94faa DT	282	};
	283
	284	struct gfs2_revoke {
	285	struct gfs2_log_element rv_le;
cd915493	286	u64 rv_blkno;
b3b94faa DT	287	};
	288
	289	struct gfs2_revoke_replay {
	290	struct list_head rr_list;
cd915493	291	u64 rr_blkno;
b3b94faa DT	292	unsigned int rr_where;
	293	};
	294
b3b94faa DT	295	enum {
	296	QDF_USER = 0,
	297	QDF_CHANGE = 1,
	298	QDF_LOCKED = 2,
	299	};
	300
5c676f6d	301	struct gfs2_quota_lvb {
e9fc2aa0 SW	302	__be32 qb_magic;
	303	u32 __pad;
	304	__be64 qb_limit; /* Hard limit of # blocks to alloc */
	305	__be64 qb_warn; /* Warn user when alloc is above this # */
	306	__be64 qb_value; /* Current # blocks allocated */
5c676f6d SW	307	};
5c676f6d SW	308
b3b94faa DT	309	struct gfs2_quota_data {
	310	struct list_head qd_list;
	311	unsigned int qd_count;
	312
cd915493	313	u32 qd_id;
b3b94faa DT	314	unsigned long qd_flags; /* QDF_... */
b3b94faa DT	315
cd915493 SW	316	s64 qd_change;
cd915493 SW	317	s64 qd_change_sync;
b3b94faa DT	318
	319	unsigned int qd_slot;
	320	unsigned int qd_slot_count;
	321
	322	struct buffer_head *qd_bh;
	323	struct gfs2_quota_change *qd_bh_qc;
	324	unsigned int qd_bh_count;
	325
	326	struct gfs2_glock *qd_gl;
	327	struct gfs2_quota_lvb qd_qb;
	328
cd915493	329	u64 qd_sync_gen;
b3b94faa DT	330	unsigned long qd_last_warn;
	331	unsigned long qd_last_touched;
	332	};
	333
	334	struct gfs2_log_buf {
	335	struct list_head lb_list;
	336	struct buffer_head *lb_bh;
	337	struct buffer_head *lb_real;
	338	};
	339
	340	struct gfs2_trans {
d0dc80db	341	unsigned long tr_ip;
b3b94faa DT	342
	343	unsigned int tr_blocks;
	344	unsigned int tr_revokes;
	345	unsigned int tr_reserved;
	346
e317ffcb	347	struct gfs2_holder tr_t_gh;
b3b94faa DT	348
	349	int tr_touched;
	350
	351	unsigned int tr_num_buf;
	352	unsigned int tr_num_buf_new;
	353	unsigned int tr_num_buf_rm;
	354	struct list_head tr_list_buf;
	355
	356	unsigned int tr_num_revoke;
	357	unsigned int tr_num_revoke_rm;
	358	};
	359
	360	struct gfs2_ail {
	361	struct list_head ai_list;
	362
	363	unsigned int ai_first;
	364	struct list_head ai_ail1_list;
	365	struct list_head ai_ail2_list;
	366
cd915493	367	u64 ai_sync_gen;
b3b94faa DT	368	};
	369
	370	struct gfs2_jdesc {
	371	struct list_head jd_list;
	372
7359a19c	373	struct inode *jd_inode;
b3b94faa DT	374	unsigned int jd_jid;
	375	int jd_dirty;
	376
	377	unsigned int jd_blocks;
	378	};
	379
	380	#define GFS2_GLOCKD_DEFAULT 1
	381	#define GFS2_GLOCKD_MAX 16
	382
	383	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
	384	#define GFS2_QUOTA_OFF 0
	385	#define GFS2_QUOTA_ACCOUNT 1
	386	#define GFS2_QUOTA_ON 2
	387
	388	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
	389	#define GFS2_DATA_WRITEBACK 1
	390	#define GFS2_DATA_ORDERED 2
	391
	392	struct gfs2_args {
	393	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	394	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	395	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	396	int ar_spectator; /* Don't get a journal because we're always RO */
	397	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	398	int ar_localflocks; /* Let the VFS do flock\|fcntl locks for us */
	399	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	400	int ar_debug; /* Oops on errors instead of trying to be graceful */
	401	int ar_upgrade; /* Upgrade ondisk/multihost format */
	402	unsigned int ar_num_glockd; /* Number of glockd threads */
	403	int ar_posix_acl; /* Enable posix acls */
	404	int ar_quota; /* off/account/on */
	405	int ar_suiddir; /* suiddir support */
	406	int ar_data; /* ordered/writeback */
	407	};
	408
	409	struct gfs2_tune {
	410	spinlock_t gt_spin;
	411
	412	unsigned int gt_ilimit;
	413	unsigned int gt_ilimit_tries;
	414	unsigned int gt_ilimit_min;
	415	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	416	unsigned int gt_incore_log_blocks;
	417	unsigned int gt_log_flush_secs;
	418	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
	419
	420	unsigned int gt_scand_secs;
	421	unsigned int gt_recoverd_secs;
	422	unsigned int gt_logd_secs;
	423	unsigned int gt_quotad_secs;
b3b94faa DT	424
	425	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	426	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	427	unsigned int gt_quota_scale_num; /* Numerator */
	428	unsigned int gt_quota_scale_den; /* Denominator */
	429	unsigned int gt_quota_cache_secs;
	430	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	431	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	432	unsigned int gt_new_files_jdata;
	433	unsigned int gt_new_files_directio;
	434	unsigned int gt_max_atomic_write; /* Split big writes into this size */
	435	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	436	unsigned int gt_lockdump_size;
	437	unsigned int gt_stall_secs; /* Detects trouble! */
	438	unsigned int gt_complain_secs;
	439	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
	440	unsigned int gt_entries_per_readdir;
	441	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
	442	unsigned int gt_greedy_default;
	443	unsigned int gt_greedy_quantum;
	444	unsigned int gt_greedy_max;
	445	unsigned int gt_statfs_quantum;
	446	unsigned int gt_statfs_slow;
	447	};
	448
b3b94faa DT	449	enum {
	450	SDF_JOURNAL_CHECKED = 0,
	451	SDF_JOURNAL_LIVE = 1,
	452	SDF_SHUTDOWN = 2,
	453	SDF_NOATIME = 3,
	454	};
	455
	456	#define GFS2_GL_HASH_SHIFT 13
	457	#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
	458	#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
	459	#define GFS2_FSNAME_LEN 256
	460
	461	struct gfs2_sbd {
	462	struct super_block *sd_vfs;
86384605	463	struct super_block *sd_vfs_meta;
b3b94faa DT	464	struct kobject sd_kobj;
	465	unsigned long sd_flags; /* SDF_... */
	466	struct gfs2_sb sd_sb;
	467
	468	/* Constants computed on mount */
	469
cd915493 SW	470	u32 sd_fsb2bb;
	471	u32 sd_fsb2bb_shift;
	472	u32 sd_diptrs; /* Number of pointers in a dinode */
	473	u32 sd_inptrs; /* Number of pointers in a indirect block */
	474	u32 sd_jbsize; /* Size of a journaled data block */
	475	u32 sd_hash_bsize; /* sizeof(exhash block) */
	476	u32 sd_hash_bsize_shift;
	477	u32 sd_hash_ptrs; /* Number of pointers in a hash block */
	478	u32 sd_qc_per_block;
	479	u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
	480	u32 sd_max_height; /* Max height of a file's metadata tree */
	481	u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
	482	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	483	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
b3b94faa DT	484
	485	struct gfs2_args sd_args; /* Mount arguments */
	486	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
	487
	488	/* Lock Stuff */
	489
	490	struct lm_lockstruct sd_lockstruct;
b3b94faa DT	491	struct list_head sd_reclaim_list;
	492	spinlock_t sd_reclaim_lock;
	493	wait_queue_head_t sd_reclaim_wq;
	494	atomic_t sd_reclaim_count;
	495	struct gfs2_holder sd_live_gh;
	496	struct gfs2_glock *sd_rename_gl;
	497	struct gfs2_glock *sd_trans_gl;
b3b94faa DT	498
	499	/* Inode Stuff */
	500
f42faf4f SW	501	struct inode *sd_master_dir;
	502	struct inode *sd_jindex;
	503	struct inode *sd_inum_inode;
	504	struct inode *sd_statfs_inode;
	505	struct inode *sd_ir_inode;
	506	struct inode *sd_sc_inode;
f42faf4f SW	507	struct inode *sd_qc_inode;
	508	struct inode *sd_rindex;
	509	struct inode *sd_quota_inode;
b3b94faa DT	510
	511	/* Inum stuff */
	512
f55ab26a	513	struct mutex sd_inum_mutex;
b3b94faa DT	514
	515	/* StatFS stuff */
	516
	517	spinlock_t sd_statfs_spin;
f55ab26a	518	struct mutex sd_statfs_mutex;
b3b94faa DT	519	struct gfs2_statfs_change sd_statfs_master;
	520	struct gfs2_statfs_change sd_statfs_local;
	521	unsigned long sd_statfs_sync_time;
	522
	523	/* Resource group stuff */
	524
cd915493	525	u64 sd_rindex_vn;
b3b94faa	526	spinlock_t sd_rindex_spin;
f55ab26a	527	struct mutex sd_rindex_mutex;
b3b94faa DT	528	struct list_head sd_rindex_list;
	529	struct list_head sd_rindex_mru_list;
	530	struct list_head sd_rindex_recent_list;
	531	struct gfs2_rgrpd *sd_rindex_forward;
	532	unsigned int sd_rgrps;
	533
	534	/* Journal index stuff */
	535
	536	struct list_head sd_jindex_list;
	537	spinlock_t sd_jindex_spin;
f55ab26a	538	struct mutex sd_jindex_mutex;
b3b94faa DT	539	unsigned int sd_journals;
	540	unsigned long sd_jindex_refresh_time;
	541
	542	struct gfs2_jdesc *sd_jdesc;
	543	struct gfs2_holder sd_journal_gh;
	544	struct gfs2_holder sd_jinode_gh;
	545
	546	struct gfs2_holder sd_ir_gh;
	547	struct gfs2_holder sd_sc_gh;
b3b94faa DT	548	struct gfs2_holder sd_qc_gh;
	549
	550	/* Daemon stuff */
	551
	552	struct task_struct *sd_scand_process;
	553	struct task_struct *sd_recoverd_process;
	554	struct task_struct *sd_logd_process;
	555	struct task_struct *sd_quotad_process;
b3b94faa DT	556	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	557	unsigned int sd_glockd_num;
	558
b3b94faa DT	559	/* Quota stuff */
	560
	561	struct list_head sd_quota_list;
	562	atomic_t sd_quota_count;
	563	spinlock_t sd_quota_spin;
f55ab26a	564	struct mutex sd_quota_mutex;
b3b94faa DT	565
	566	unsigned int sd_quota_slots;
	567	unsigned int sd_quota_chunks;
	568	unsigned char **sd_quota_bitmap;
	569
cd915493	570	u64 sd_quota_sync_gen;
b3b94faa DT	571	unsigned long sd_quota_sync_time;
	572
	573	/* Log stuff */
	574
	575	spinlock_t sd_log_lock;
b3b94faa DT	576
	577	unsigned int sd_log_blks_reserved;
	578	unsigned int sd_log_commited_buf;
	579	unsigned int sd_log_commited_revoke;
	580
	581	unsigned int sd_log_num_gl;
	582	unsigned int sd_log_num_buf;
	583	unsigned int sd_log_num_revoke;
	584	unsigned int sd_log_num_rg;
	585	unsigned int sd_log_num_databuf;
f42faf4f	586	unsigned int sd_log_num_jdata;
b09e593d	587	unsigned int sd_log_num_hdrs;
f42faf4f	588
b3b94faa DT	589	struct list_head sd_log_le_gl;
	590	struct list_head sd_log_le_buf;
	591	struct list_head sd_log_le_revoke;
	592	struct list_head sd_log_le_rg;
	593	struct list_head sd_log_le_databuf;
	594
	595	unsigned int sd_log_blks_free;
71b86f56	596	struct mutex sd_log_reserve_mutex;
b3b94faa	597
cd915493	598	u64 sd_log_sequence;
b3b94faa DT	599	unsigned int sd_log_head;
b3b94faa DT	600	unsigned int sd_log_tail;
b3b94faa DT	601	int sd_log_idle;
	602
	603	unsigned long sd_log_flush_time;
484adff8	604	struct rw_semaphore sd_log_flush_lock;
b3b94faa DT	605	struct list_head sd_log_flush_list;
	606
	607	unsigned int sd_log_flush_head;
cd915493	608	u64 sd_log_flush_wrapped;
b3b94faa DT	609
	610	struct list_head sd_ail1_list;
	611	struct list_head sd_ail2_list;
cd915493	612	u64 sd_ail_sync_gen;
b3b94faa DT	613
	614	/* Replay stuff */
	615
	616	struct list_head sd_revoke_list;
	617	unsigned int sd_replay_tail;
	618
	619	unsigned int sd_found_blocks;
	620	unsigned int sd_found_revokes;
	621	unsigned int sd_replayed_blocks;
	622
	623	/* For quiescing the filesystem */
	624
	625	struct gfs2_holder sd_freeze_gh;
f55ab26a	626	struct mutex sd_freeze_lock;
b3b94faa DT	627	unsigned int sd_freeze_count;
	628
	629	/* Counters */
	630
	631	atomic_t sd_glock_count;
	632	atomic_t sd_glock_held_count;
	633	atomic_t sd_inode_count;
b3b94faa	634	atomic_t sd_reclaimed;
b3b94faa DT	635
	636	char sd_fsname[GFS2_FSNAME_LEN];
	637	char sd_table_name[GFS2_FSNAME_LEN];
	638	char sd_proto_name[GFS2_FSNAME_LEN];
	639
	640	/* Debugging crud */
	641
	642	unsigned long sd_last_warning;
86384605	643	struct vfsmount *sd_gfs2mnt;
b3b94faa DT	644	};
	645
	646	#endif /* __INCORE_DOT_H__ */
	647